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arXiv · 0909.5615

Pionic BEC--BCS crossover at finite isospin chemical potential

Masayuki Matsuzaki
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Abstract

We study the character change of the pionic condensation at finite isospin chemical potential μ_\mathrm{I} by adopting the linear sigma model as a non-local interaction between quarks. At low |μ_\mathrm{I}| the condensation is purely bosonic, then the Cooper pairing around the Fermi surface grows gradually as |μ_\mathrm{I}| increases. This q-\bar q pairing is weakly coupled in comparison with the case of the q-q pairing that leads to color superconductivity.

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Masayuki Matsuzaki. 2010-07-20. Pionic BEC--BCS crossover at finite isospin chemical potential. https://doi.org/10.1103/physrevd.82.016005

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